/*
 * Copyright 2017-2021 The OpenSSL Project Authors. All Rights Reserved.
 * Copyright 2017 Ribose Inc. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#ifndef OSSL_CRYPTO_SM4_H
#define OSSL_CRYPTO_SM4_H
#pragma once

#include <openssl/opensslconf.h>
#include <openssl/e_os2.h>

#ifdef OPENSSL_NO_SM4
#  error SM4 is disabled.
#endif

#define SM4_ENCRYPT 1
#define SM4_DECRYPT 0

#define SM4_BLOCK_SIZE 16
#define SM4_KEY_SCHEDULE 32

typedef struct SM4_KEY_st
{
  uint32_t rk[SM4_KEY_SCHEDULE];
} SM4_KEY;

int ossl_sm4_set_key(const uint8_t *key, SM4_KEY *ks);

void ossl_sm4_encrypt(const uint8_t *in, uint8_t *out, const SM4_KEY *ks);

void ossl_sm4_decrypt(const uint8_t *in, uint8_t *out, const SM4_KEY *ks);

#endif
